Bibliography

http://digestive.niddk.nih.gov/ddiseas es/pubs/yrdd/i ndex.aspx#2

http://www.biology4kids.com/files/systems_main.html

http://www.livestrong.com/article/130205-inte resting-digestive-system/

Video: Why Do We Have a Digestive System? | eHow.com

http://www.ehow.com/video_4755452_why-do-we-have-digestive.html#ixzz1xDmpOSc6

http://homepage.mac.com/seisenelem/bodysystems/Digestive/interesting.html

http://www.innerbody.com/image/digeov.html#anatomy-term-bottom

http://homepage.mac.com/seisenelem/bodysystems/Digestive/othersystems.html